Study of light tetraquark spectroscopy

We calculate the masses of the qq (q) over bar (q) over bar tetraquark ground state and first radial excited state in a constituent quark model where the Cornell-like potential and one-gluon exchange spin-spin coupling are employed. The three coupling parameters for the Cornell-like potential and one-gluon exchange spin-spin coupling are proposed mass-dependent in accordance with lattice QCD data, and all model parameters arc predetermined by studying light, charmed, and bottom mesons. The theoretical predictions for light tetraquarks are compared with the observed exotic meson states in the light-unflavored meson sector, and tentative assignments arc suggested. The work suggests that f(0)(1500) and f(0)(1710) might be ground light tetraquark states with J = 0.